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Translate the Equation Mat at right into an equation. Remember that the double line represents “equals.”

Write the equation listing all of the tiles on the mat.

A 4 region equation mat.  Positive Left has 2 positive  unit tiles and 2 negative x tiles.   Negative Left has 4 positive unit tiles and 1 negative x tile.  Positive Right has 2 positive unit tiles and 3 negative unit tiles.    Negative Right has 1 positive x tile and 2 negative unit tiles.Shaded tile is plus 1.  Tile is negative 1.

Use the eTool below to translate the Equation Mat into an equation.
Click the link at right for the full version of the eTool: 2-76 HW eTool